Katy Perry and John Mayer

Christopher Polk / Getty Images

Katy Perry and John Mayer have flipped their on-off switch to off once again. Though multiple sources fueled reports in mid-March, those voices seemed to be saying the breakup might not be as final as all that. It appears to be work that drove the split, with Mayer readying for a tour after struggling with vocal problems for the better part of two years and the former Mrs. Russell Brand working on her third studio album. The two had been dating for about seven months since a brief break in August 2012. They'd dated casually for a bit before that. But in June, the couple was very much back on and even recorded a duet, "Who You Love," together. MORE: Katy Perry and John Mayer reportedly split again

Katy Perry and John Mayer have flipped their on-off switch to off once again. Though multiple sources fueled reports in mid-March, those voices seemed to be saying the breakup might not be as final as all that. It appears to be work that drove the split, with Mayer readying for a tour after struggling with vocal problems for the better part of two years and the former Mrs. Russell Brand working on her third studio album. The two had been dating for about seven months since a brief break in August 2012. They'd dated casually for a bit before that. But in June, the couple was very much back on and even recorded a duet, "Who You Love," together. MORE: Katy Perry and John Mayer reportedly split again (Christopher Polk / Getty Images)

Katy Perry and John Mayer have flipped their on-off switch to off once again. Though multiple sources fueled reports in mid-March, those voices seemed to be saying the breakup might not be as final as all that. It appears to be work that drove the split, with Mayer readying for a tour after struggling with vocal problems for the better part of two years and the former Mrs. Russell Brand working on her third studio album. The two had been dating for about seven months since a brief break in August 2012. They'd dated casually for a bit before that. But in June, the couple was very much back on and even recorded a duet, "Who You Love," together. MORE: Katy Perry and John Mayer reportedly split again